chore: enlarge database connection pool

[lizhanhui]

No description provided.

[codecov]

Codecov Report

Merging #671 (d88a7cc) into main (0acc27b) will increase coverage by 1.06%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #671      +/-   ##
============================================
+ Coverage     57.62%   58.69%   +1.06%     
- Complexity     1211     1236      +25     
============================================
  Files           130      130              
  Lines          7967     7967              
  Branches        726      726              
============================================
+ Hits           4591     4676      +85     
+ Misses         2982     2872     -110     
- Partials        394      419      +25     

Components	Coverage Δ
RocketMQ Broker	∅ <ø> (∅)
RocketMQ Common	5.80% <ø> (ø)
RocketMQ Controller	58.17% <ø> (+3.37%)	⬆️
RocketMQ Proxy	42.75% <ø> (ø)
RocketMQ Store	77.32% <ø> (-0.40%)	⬇️
RocketMQ Stream	∅ <ø> (∅)
RocketMQ Metadata	35.29% <ø> (ø)

Files	Coverage Δ
...tomq/rocketmq/metadata/DruidDataSourceFactory.java	91.17% <100.00%> (ø)

... and 20 files with indirect coverage changes